There is a neat symmetry when a detection-and-response vendor describes how it responds to threats against itself. SentinelOne (NYSE: S) filed its fiscal-2026 10-K on March 19, 2026, and its Item 1C section says its framework “includes steps for identifying the source of a cybersecurity threat or incident” — source-first triage, the same instinct its platform automates for customers.
Why lead with source? Because attribution shapes everything downstream: a commodity malware hit, an insider event, and a nation-state intrusion call for different containment, different disclosure judgment, and different legal posture. A framework that foregrounds source identification is one designed to route incidents correctly from the first hour — which is also what the materiality assessment depends on.
The language has matured over successive filings. SentinelOne’s fiscal-2025 10-K similarly describes assessing whether a threat “is associated with a third-party vendor or service provider” before gauging severity. The recurring third-party question, shared with peers like CrowdStrike, underscores that supply-chain attribution is now a standard early step in disclosed triage frameworks.
For defenders, the practical lesson is to treat source identification as a structural stage, not a forensic luxury. Building “internal, vendor, or external; commodity or targeted” into the first triage gate accelerates every later decision — including the legally consequential one of whether the incident is material and the 8-K clock has started.
Read alongside the other anchors’ Item 1C sections, SentinelOne’s framework rounds out a consistent picture: the leading EDR vendors disclose process-driven, attribution-first incident handling. The primary record is at sec.gov, surfaced through EdgarBeast (“SEC filing data API & evidence index”). When the vendor whose product answers “what is this and where did it come from?” structures its own 10-K the same way, that is a defensible model for everyone else.